Torque dynamometer



y 1932- A. s. MACKENZIE 1,857,688

TORQUE DYNAMOMETER v Filed Feb. 3; 1928 I5 Sheets-Sheet 1 1 I i r a flu/wanton y 1932- A. s. MACKENZIE 4 1,857,688

TORQUE DYNAMOMETER Filed Feb. 3, 1928 5 Sheets-Sheet 2 gmemtoz Jillaznrzder 5.

May 10, 1932. A. s. MACKENZIE 1,857,688

TORQUE DYNAMOMETER Filed Feb. 5, 1928 Sheets-Sheet 5 gwuwntot I JZZarander 5. flfqcke/zzz'e,

' Patented May 10, 1932 ALEXANBER s. MACKENZIE, or" nousroivj rrzxA'shnssienonlro" c ientele-ceias v rnsss ooMrAnY, or HOUSTON, TEXAS, ACORPQRATION on'rnxns- TORQUE DYNAMoMErn-a i Application filed February 3,1928. Serial in 251325.;- 3 a This invention relatesto new and usefulc general by the'lett'er A and is of identically improvements in torque dynamometers An important object of the invention is to provide a torque dynamometer with a con- 7 5 struction adapting it to be effectively en1-- ployed as a coupling device for driving and drlven elements so that it willserve the func prevent injury to g p p 1 1 press A-"is of the round bale type and inthis tion of a safety device to the driven element or device. I

Another important object of the inventlon is to provide indicating means for a baling press lncluding ballng rolls, and which wlll not only indicate in terms of torque, theresistance offered by the baling rolls and other parts of the press to the power device; but

one which will also indicate in a highly satisfactory manner, the density of thebaled material during all stages of'thebaling operation.

tion resides in the provision of a simple and efficient torque dynamometerin whiehthe number of partsare reduced to a minimum and the arrangement is such that certain parts .35 provide for the protection ofcertain other parts.

Other objects and advantages of the invention will become apparent duringthe course of the following description.

Figure 1 is a front elevation of a round bale press with the invention applied thereto;

Figure 2 is an enlarged top plan of my im proved torque dynamometer.

Figure 3 is aside velevation of thesamey parts thereof being broken 0 inter or construction.

away to show the Figure 7 is an enlargedfragmentary view' of part of the indicator mechanism. l

7 Referring now moreparticularlyto'the A further important object of the elven- In the drawings forming a part of the depart G, as will be readily illIldGI'StOOd. The drive plate 9 is provided with apluralityof apertured inwardly "extending bosses -13 Figure 4; isa verticaltransverse section of I q I a.

' Adrivenplate-ordisk 15 1s mounted on the is provided with ant-inwardly extending hub drawings, a round bale press is indicated in particular instance includes twelve baling rollsyeach ofwhi'ch is positivelyrotated by a seriesofpowerelements all'ofwhich de-' rive power from a counter: shaft. IB; 7 having keyed-thereto, afsp rocket which isldriven by means of a sprocket chain C operating over 'a=.sp1'ocket' loosely mounted upon-a drive shaftand liavingan extended hub D to cooperate'withmyimproved torque dynamom eter indicated in general-by the letter" F. V

1 This drive shaft is-seoured to-aid'riven part :G or a 'manuallycontrolledz clutch, the cooperating drivingipart not the clutchlbeing V loosely mounted-upona driveshaftflL to be driven by a pulleyI which maybe'fcontin'uously driven from a suitable source 'to drive'f 7 i the press thrdughthe mechanisnicjust deseribedx-A hand lever J is suitably mounted to :engage and disengage. the clutch parts G and-H in the usual manner;

My improvedtorque dynamometeri F. comprises a driving plate ordisk Qahaving a hub 10 extended outwardly thereof and secured to the'drive sh'a ftllasiby'a set-screw 12.

This drive shaft '11 is connectedto the clutch spaced 'equidistantlyaroiind the disk.

pin ltisdoweled ineac'h-boss l3pand h astits;

inner end extending i-nwardly'ibeyond-the 9 boss' as' clearly shown inJjFigure 4: '5

shaft 11 in spaced relation to the plate;-9and '16 secured to the \Q-XbQIldGd hub Dgof the sprocket heretofore described as being loose- 1y mounted-upon the drivefshaftFlliby=means of the bushing-" 17; This*driven; .,pl'atel5 is likewise lprovided'with the same number Y, 7 V ofinwardly extending apertured bosses (as: 9

a guide -.-collar plate 9 aiota tes V .25

"-23 to :abut .the sends the driving plate 9, and pins are likewise doweled into these bosses just as are the pins 14 of the driving plate for pivotally mounting a plurality of cages 19 upon the driven plate. The outer end of each cage is internally sc-rew ithreaded for the reception .of. a

"20 centrally aapertured for sliding engagement with a bolt 21. This bolt has its inner end within the cage threaded for'thereception of ahead 22, which,-as -best shown in Figure 6, is "provide' cl'wit'h a "pair of diametrically arranged outwardly .eX- tending projections 23 which operate in slots 24 provided at diametricallyroppositepoints in the ca e 19; This construction prevents :turningo' *thezplunger headswithimthepages and also limits the relative LmoVementof'athe :driiveia-nd driven plates i9iand 1 5, as awell as to prevent excessivelconrpressi'on of a coiled spring 25 surrounding each zholt2l and thawits sends abutting :the :collar :20 and "the head :22 iotf the; plmrger. The :tension Of the .springs 125 is preferably such that :the drive lithese springs witho ticausin'g the'projections spring tension canvroloviously :be varied by adjustment :of the collars 20.. I

Ellhe .outer :end oft-each sboltx2 1 terminates in an eye 26 which-is mounted "upon its fre- 'spective .;pin 14 and :is remowahly retained thereon @bymeans ,Oftfl, washerr27 andacotter pin-128 or the like. Theccages .19 armsimirlar- 1y connected :to pins mounted inthe ibDSSfiS 18 of the driven plate 15. lA'lthough, 10116 or more otithese spring des 'icesavill she su'flicient to'ffo'rm a yielding cmm'ection Ebetween the drive mni'rl idriaien platestas illustrated, :Eonr

such devices are employed .:in the present --illmstration. r I n -ordertolrecord the relative movement of itheplates :9 :and 1 5., or :frn other words,

theitorqueresistarrceiofithecdnivenielementl5, a member 29 init-hetomnaof azing ismoimted upon the peripheries :of the drive rlriven d isksa9 ans tospan thetspace bet-Ween these members and to coverzhhe spring .ad-evices arrangedwbetweenthem. This-ring 29 provided ion inner periphery "adjacent one edge withuaxially :extendinggrooves 3.0 :for sliding engagement with keys :or splines 31 securedto the peripheryoftherdriven disk 15 V :rip'hery, :a's therefore,

the ring 29 wzi l'larotate with ithe drrven aCliSkl5 at points :spacedequidistant :around its peshown' in vIiiignre It will, beseenthat'with-dihis construction axiall y -thereof ml the splinest3 1. 7 2 r V e L order tolimpart ax ial inioveme'nt to the rin g 29 iuporn relative movement :of the "drive and dIil V?I1Jpltt6S,iit sis equipped with :a plu-- of diagona llyzarramgedeam slots 32 in whiohaoperate projections 33 carried by the j eyes26 10f therboittsi2l. Eachvof these pm- {$5 ljeotions is equipped with the'head :34 adapt- :the driven plate :15 v'ith-roughstead of =the"driven plate 15 being :mounted' zofithe slots 24, and the suitable idevice,

created in the press! As soon as this upon-the slightest of torque.

' formed .by a pair of spaced outstanding annular flanges. Within this groove there is adapted to operate, a shoe36 which "is connected, 'by meansxof a crank 37 to an indivcatorshaft 38 mounted in a bearing 39 oi a stand 40 which may be suitably secured to the .lbase-of the pressorcany other suitable foundation. The outer face of this stand is equipped with vernierigraduations il for cooperation with a pointer .42 secured to the shaft38.

The modific ation'shown in Figure 5 is iden- 'tica'lly-the same as that shown in a Figure 4, but,ris designed to serve as :a coupling Flositween :.a divided shaft, the :section 11 thereof being the driving section,"wher.eas thesection 43 is the driven :SBCtlOllD-f the :shafit. In-

loosely upon the shaft in this instance,':it is provided with an outwardly extending hub 44 which :is secured to the "driven shaft section '43 :by means of aset screw 45hr other :From the foregoing description it will be 'seen :thatvthe rotation of the drive shaft ill will rotate the drive -;plate '9 and by reason of the sprlng plunger connect ons with the driven plate, will causerthe :latter to rotate, to '2 turn eitherthe extended hub D ofthe driven sprocket orithedrivensection 43 of theshaft and through 'theintermed-iac-y of the sprocket -:chain .0 will :drive the bearing rolls of the :press. .Mfhenever resistance offered ?by thebaling rolls or the power devices which oper- :ate the'sa me through the driven plate 15 of :the idynamometer, the coil springs 25 will hecome compressedito the degree :of torqueibewing exerted, and thegpnojections 33 of the v3 plunger mechanisms will movethrough the slots '32 and cam the :ring 29 to move it axially of the shaft on the keys '31.. Due to the 7 shoe 36 engaging in-thegroove r35 ofthe-ring,

"the shoe will be :moved to one side, thereby turning the crank 37 and rotatingthe pointer 42 relative to the graduations 41 to give a visible indication of the amount of torque V torque diminishes, the springs 25 willreturn *to their normal positions to returnthe "rings 29 to its normal positionto be again moved As outlined in my above named copending application, 'I have discovered that such an 5125 indicating mechanism can be employed toadvantage for 1nd1ca-t1ng,-1nterms of torque,

of the balin g rolls, but for indicating the .not onlythe resistance offered-to the :rotation rolls or other its formation, and whenever excessive friction 13 being created 1n the bearings of the It is well known that there is a normal torque in baling cotton, and this will turn the indicator to a certain point when bales of certain poundage are being formed. As explained in my copending application, this torque varies with different grades of cotton and under different atmospheric conditions Some days it will be higher and some days lower, but having once determined within reasonable limits the position assumed by the indicator when baling particular cotton under existing atmospheric conditions, it is pos sible to keep an accurate check on the press for after having, turned out one bale and established a normal torque, it is found that as the baling proceeds, the indicator turns over considerably beyond the reasonable range of limits, it can then be assumed that there is something wrong with the press and excessive friction is being created by some of the parts. The press can then be stopped and the cause of excessive torque remedied. It will also be apparent that as the bale of material nears complete formation, theindicator hand or pointer 42 will indicate a certain amount of torque so as to apprisethe operator as to when to discharge the bale from the press so that it will have the required density and poundage.

T'Vhile I have described my improveddynamometer in connection with a baling press, it will be understood that I do not limit its uses to that art and that it can be effectively employed in any art in mination is desired, or where a safety coupling is required. It is also to be understood that various changes as to the arrangement, size and shape of the various parts may be made without departing from the spirit of the invention or the scope of the claims.

What I claim is: i

1. A device of the class described comprising a pair of rotatable members, yieldable means connecting them for relative turning movement, cam means encircling both of said members and actuated by said relative movement, and indicator means opera'ed by said cam means.

appended 2. A dynamometer comprising drivinganddriven disks arranged with an interven} ing space therebetween throughout their ex tent, yieldable means arranged in said space and connecting said disks to permit their relative turningmovement, cam means encircling both of said disks and said space andjactnated by said relative movement, and indicator means operated by said cam means. 7

3. A dynamometer comprising a pair of ro tatable members, yieldable means connecting them, for relative movement, a ring peripherally disposed relative to said members and portions of the power device ,tatable members, spring means the same for permitting theirrelativeturnperipherally disposed relative tolsaid members and actuated by said said shaft and'shoe.

; I 8. In a dynamometer, a pair of rotatable m which torque deter-i, 1 i

discs, spring means connecting the same and said stand andrhaving driven members,

ingsaid plunger and cage, said driving member, sa1d plunger havingan' feye receiving saldpm, a

means operated by said ring,

4. A dynamometer comprising a pair of ro-' tatable members,yieldable means permitting their relative movement, a ring encircling sa1d members and actuated bysald relat ve --movement, said ring'having a cam slot, means on one of said members operating in said slot, and indicator means operated by said ring.

5. A dynamometer comprisinga pair of reconnecting ing movement, a ring relative movement, saidfringhaving a diagonal slot, means'carried by one of said members and operating in sa1d slot, and indicatormeans operated by said ring. R, 6. A dynamometercomprising a parrot rotatable members, a spring restrained plunger including a bolt connecting said members and permitting their relative movement, a ring actuated by said relative movement and having a cam slotf, a projection carried by said boltoperating in said "slot, andfindicator means operated by said ring.

I, In a dynamo'meter, a pair of rotatable discs, I ielding means connecting the same and: permitting relative turning movement,-a ro tatable and axially movable member mounted upon one ofsaid discs and having a periph-' eral groove, a shoe operat ng in sa1d groove,

and a crank connect ng" an indicator shaft,

groove, anindicator. stand having a setof graduations, an indicator shaft journaled in a pointer cooperating with said graduations, and a crankcarried di rectly by said shaft and connected directly'to saidshoe. 3 a '9. A dynamometer comprising driving and a cage connected to, said no a driven member and having slots,aplunger connected to the driving member operatingin said cage and slots, aspring in said 'cageabut erated by said cam member.

10. A dynamometercomprising a pair of" relatively rotatablemembers,yieldablemeans said relative movement and having a cam slot,

means carried by one of said members and ex-' a pin carried; by

cam member enconnecting the samefor relative movement, an indicator operating member actuated by tending Iiaral'lel to "he axis thereof, and fa brojection of said last-named means operatin-g in said cam slot.

11. A dynamometer comprising a pair of relatively rotatable members, spring means connecting the same for relative turning movement, an arcuated member rotatable ivith andni'ova'ble axially of one of said members, said ar'cuated member having 'a s1ot-,-an'd aradially projecting member carried by said other member and operating in said slot.

12. A 'dynamoineter comprising a pair of relatively rotatable discs, yielding nieans connecting thesaine for relative turning movemerits, a ring'splined on the periphery of one of said d'scs and overlapping the periphery 'o ft h e other disc, s'aid'ring having a cam slot, a nd means carried by said other member and operating in said 'slot.

20 13. A dynamoineter comprising driving anddriven members, a cage connected to said amen member, a plunger connected to the v ing member and operating in said cage, a spring in said cage abutting said plunger,

' a "p'in carried by said 'driving'member, said p111 ge'rhaving aneye receiving said pin, said "aye being provided -With a projection, and a v cam member 11 'v'in'ga slot receivin'g'sai'd projecti'o'n and ada b'ted to be operated by the relative movement of said driving and driven members. 7

1'4. A deviceofthe class described comprising "a pair of rotatable members, yieldab'le means connecting them for relative turning 7'35 movement, an 'annulus'encircling both of said members, cam means for moving said annulus upon relativemoveme t'of s'aidfmembers, and indicator means operated by said annulus.-

1'5. A device of the class described com- 40 irising a pair of rotatable members, yieldable ineans'connecting them for relative turn- I ing movement, an annulus encircling-both of said members, means for moving said annulus axially upon relative movementof said members, and indicator means operated by "said annulus. V

16. A dynamometer comprising driving and driven members, a cage connected to said driven member and having slots, a plunger connected to the driving memberoperating in said cage "and slots, aspiring in said cage abutting said lun'ger and 'cage,a pin carried "by 'said driving member, said plunger having 7 Ian "eye receiving said pin, and said driven member having an annular flange encircling said driving memberr In testimony v'vhereof I have hereunto 'set my hand. j ALEXANDER S. MACKENZIE. 

